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027b359f38fac223e20bb3322db6af739e6b1961
There is a big delay between DMA transmission completed and waiting for interruption, which results in the degradation of read performance. It is modified to use usleep_range delay without interruption, and the read performance is improved by 40%. Change-Id: Ia9b92382d7a1a4fbd157dace2067c7dd15cb69ca Signed-off-by: Yifeng Zhao <zyf@rock-chips.com>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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